	US 11,867,875 B2
	Monomer composition for contact lenses, polymer for contact lenses, contact lens, and method of producing the contact lens
Ryuya Gotanda, Kawasaki (JP); Koh Kobayashi, Kawasaki (JP); Shu Takashima, Kawasaki (JP); Norio Iwakiri, Kawasaki (JP); Yosuke Matsuoka, Kawasaki (JP); and Eiji Harata, Kawasaki (JP)
Assigned to NOF CORPORATION, Tokyo (JP)
Appl. No. 17/275,799
Filed by NOF CORPORATION, Tokyo (JP)
PCT Filed Sep. 10, 2019, PCT No. PCT/JP2019/035531 § 371(c)(1), (2) Date Mar. 12, 2021, PCT Pub. No. WO2020/066598, PCT Pub. Date Apr. 2, 2020.
Claims priority of application No. 2018-179067 (JP), filed on Sep. 25, 2018.
Prior Publication US 2022/0035076 A1, Feb. 3, 2022
Int. Cl. C08F 230/08 (2006.01); G02B 1/04 (2006.01); G02C 7/04 (2006.01)

CPC G02B 1/043 (2013.01) [C08F 230/08 (2013.01); G02C 7/049 (2013.01)]

16 Claims

1. A monomer composition for contact lenses consisting of:

(A) a siloxanyl group-containing itaconic acid diester monomer of the following formula (1):

(B) one or more amide group-containing monomers selected from the group consisting of N-vinylpyrrolidone, N-vinyl-N-methylacetamide, and N-vinylacetamide;

(C) one or more hydroxy group-containing monomers selected from the group consisting of hydroxyethyl (meth)acrylate, hydroxypropyl (meth)acrylate, hydroxybutyl (meth)acrylate, hydroxyethyl acrylamide, ethylene glycol monovinyl ether, and diethylene glycol monovinyl ether;

(D) a siloxanyl group-containing (meth)acrylate of the following formula (2):

wherein R¹is a hydrogen atom or a methyl group, and n is 10 to 20; and

(E) a cross-linking agent,

wherein with respect to 100% by mass of a total of the components (A) to (E) in the composition, a content ratio of the component (A) is 5 to 60% by mass, a content ratio of the component (B) is 10 to 60% by mass, a content ratio of the component (C) is 5 to 45% by mass, a content ratio of the component (D) is 5 to 35% by mass, and a content ratio of the component (E) is 0.1 to 15% by mass.